The gdisk man page suggests using the '-a' option to align partitions on a
solid state disk:
"Align Change the sector alignment value. Disks with more logical sectors
than physical sectors (such as modern Advanced Format drives), some
RAID configurations, and many SSD devices, can suffer performance
problems if partitions are not aligned properly for their internal
data structures. On new disks, GPT fdisk attempts to align
partitions on 2048-sector (1MiB) boundaries by default, which
optimizes performance for all of these disk types. On
pre-partitioned disks, GPT fdisk attempts to identify the alignment
value used on that disk, but will set 8-sector alignment on disks
larger than 300 GB even if lesser alignment values are detected. In
either case, it can be changed by using this option."
Is my interpretaion correct?
I have a Samsung 300G SSD in the new desktop. I interpret the above as
advising me to use the '-a' option when I use gdisk to create GPT partitions
on it because gdisk will not automatically align logical sectors on SSDs.
Rich
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